Starter Removal

I guess this is where this should go...

I can't for the life of me remove the starter on my '69 Valiant with a 273 V8. I took off the wires, bottom nut, and took out the top bolt and my understanding is that it should just come off without a problem. Mine's not budging. I tried placing a board on the otherside and hitting a few times with a mallet, not helping.

Any ideas?